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Did You Know?

Hong Kong's Public Clock Started as a Punishment

Hong Kong has more skyscrapers than any other city on Earth, though Shenzhen is closing in fast.

The city contains over 9,000 high-rise buildings. More than 1,000 of them stand above 100 metres. By the standard definition used by the Council on Tall Buildings and Urban Habitat — 150 metres and up — Hong Kong has somewhere between 569 and 669, depending on the count and the cut-off date. Guinness, using CTBUH figures from January 2025, gives 669.

New York, which held this title from the invention of the skyscraper until the early 2000s, has around 320. Chicago, where the first one was built, has 137.

Above 200 metres, Hong Kong has 102 buildings. Above 300 metres, six. Above 400 metres, two. The tallest is the International Commerce Centre at 484 metres and 118 storeys.

The reason is geography rather than ambition. Hong Kong is wedged between mountains and the sea with very little buildable land, so the only available direction was up.

The clock: and the building that started it was put up by a familiar name.

Hong Kong's first structure over 150 metres was Jardine House, completed in 1973 — built by Hongkong Land, part of the Jardine Matheson group.

Every day at noon, on the Causeway Bay waterfront, a uniformed guard employed by the trading house Jardine Matheson marches to a small enclosure, rings a ship's bell eight times to mark the end of the forenoon watch, fires a naval gun over the typhoon shelter, rings the bell again, and marches away.

This has been happening for more than a hundred and sixty years, and according to the story Hong Kong tells about it, it began as a reprimand.

Jardine Matheson bought the land in 1841 — the first plot sold at public auction in colonial Hong Kong. The company kept a gun on its waterfront and, by custom, fired a salute whenever the taipan, the head of the firm, arrived or departed.

Around 1860 a senior Royal Navy officer newly arrived in Hong Kong heard this and was not amused. Gun salutes were the prerogative of the Governor and senior military officers, not of a trading company's boss. As a punishment, Jardine Matheson was ordered to fire the gun every day at noon, in perpetuity, as a public time signal for the colony.

They are still doing it.

The tradition paused only during the Japanese occupation, when the original gun disappeared. It was replaced in the 1960s with a smaller model after neighbours complained about the noise. It fires at midnight on New Year's Eve too, and since 1989 sponsors can pay to fire it, with the proceeds going to charity.

What makes this more than an anecdote is what the gun was actually for.

Hong Kong was a harbour economy, and harbour economies need public time. Ports around the world solved this visually, with time balls dropped at a fixed hour so ships could set their chronometers — Greenwich did it, and New York's New Year's Eve ball drop was modelled on the same idea. Hong Kong had visual signals too. But a gun has one advantage over a ball: you do not have to be looking at it.

So Hong Kong got a sonic time signal, audible for miles across the water, fired by a private company under naval orders, as a favour to the whole colony that nobody asked for and nobody has since cancelled.

Hong Kong sits at 114° east and runs on UTC+8, a zone built for the 120th meridian. Which means the gun that told the city what noon was has always fired about twenty-three minutes before the sun actually reaches its highest point — and has been perfectly, publicly, reliably wrong about it every single day since.